ESR study of magnetic structures in La0.7Ca0.3MnO3 |
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| Institution: | 1. University of Pennsylvania, Pennsylvania, United States;2. Federal Reserve Bank of Atlanta, United States;3. Shanghai University of Finance and Economics, China;4. University of Oxford, Department of Economics, Manor Road, Oxford OX1 3UQ, United Kingdom |
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| Abstract: | Comprehensive measurements of electron spin resonance (ESR) and magnetization of La0.7Ca0.3MnO3 in the ferromagnetic as well as paramagnetic phases were carried out. Quantitative evidences for the inhomogeneous magnetic structure, consisting of ferromagnetic microregions embedded in the antiferromagnetic surrounding near Tc, were found. It is suggested that the microscopic local magnetic structures above and below Tc are qualitatively similar except that the phase below Tc carries long range order between the ferromagnetic microregions whose sizes grow with decreasing temperature. |
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